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CHM 201 Lab - Determination of an Equilibrium Constant

# CHM 201 Lab - Determination of an Equilibrium Constant -...

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Data and Calculations: Concentrations: pH: Xylenol Orange: 5e-4M Xylenol Orange: 2 Reading 1 Reading 4 Temperature: 75 degrees C Temperature: 60 degrees C % Transmittance: 37% % Transmittance: 75% Transmittance: .37 Transmittance: .75 Absorbances: .4318 Absorbances: .1249 K: 2.699e-5 K: 5.111e-6 Reading 2 Reading 5 Temperature: 70 degrees C Temperature: 55 degrees C % Transmittance: 49% % Transmittance: 81% Transmittance: .49 Transmittance: .81 Absorbances: .3098 Absorbances: .0915 K: 1.615e-5 K: 3.605e-6 Reading 3 Cold Water Bath Reading Temperature: 65 degrees C Temperature: 4 degrees C % Transmittance: 61% % Transmittance: 24% Transmittance: .61 Transmittance: .24 Absorbances: .2147 Absorbances: .6198 K: 9.815e-6 K: 5.481e-5 (Example of steps to get these numbers on next page) Example of Calculations for Reading 1: Al +++ : 1e-4M Al +++ : 2 [AlQ at equil ]: 1.92e-5 [AlQ at equil ]: 5.55e-6 [Al at equil ]: 3.08e-5 [Al at equil ]: 4.45e-5 [H 4 Q at equil ]: 2.31e-4 [H 4 Q at equil ]: 2.44e-4 [AlQ at equil ]: 1.38e-5 [AlQ at equil ]: 4.07e-6 [Al at equil ]: 3.62e-5 [Al at equil ]: 4.59e-5 [H 4 Q at equil ]: 2.36e-4 [H 4 Q at equil ]: 2.46e-4 [AlQ at equil ]: 9.54e-6 [AlQ at equil ]: 2.75e-5 [Al at equil ]: 4.05e-5 [Al at equil ]: 2.25e-5 [H 4 Q at equil ]: 2.40e-4 [H 4 Q at equil

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